Hi welcome to healthcareMagic
The above signs and symptoms like Maculo papular rahes all over the body, swelling of feet, palms, tacchycardia , suuggest that you are suffering from Acute Allergic Reaction
.. you must be clinically evaluated and treated... the common cause for allergy
are dust, pollen grains, insects like cockroach, animal dander, smoke, new clothes, any food item,,,... hence the actual cause must be found... Anti histaminics will be useful, until you meet doctor... Tab. Allercet Dc once daily may be helpful... Hope i have answered your question...